Cover



Jan. 5 1926. 1,568,878

J. G. CHAMBERS covfin Filed Dec. 29. 1924 2 Sheets-Sheet 1 wuentpv JG. 024mm Jan. 5,1926. 1,568,878

, J. G. CHAMBERS COVER Filed Dec. 29. 1924 2 Sheets-Sheet 2 J 6T Chamers gmentoc Patented Jan. 5, 1926.

UNITED STAT FATE oFFrcs.

JAMESG. CHAMBERS, F MONTREAL, QUEBEC, CANADA.

COVER.

Application filed-1 December 29, 1924. Serial No. 758,7681

To all whom it only concern.

Be it known that I, JAMES G. CHAMBERS, a citizen of the United States, residing at;

Montreal, in the Province of Quebec and Dominlon of Canada, have mve-nted new and phone by simply moving a slidable element on the telephone receiver.

A further object is the provision of means for closing thespeaking tube of a telephone which is practically automatic in operation and which may be readily attached to anyordinary type ot telephones.

Vith the above broadly stated objects in view and others which will appear as the nature of the invention is better understood, reference is to be had to the drawings which accompany and which form part of this application.

In the drawings Figure 1 is a perspective view of a telephone provided with the improvement.

Figure 2 is a fragmentary sectional View approximately on the line 2-'2 of Figure 1.

Figure 3 is a sectional view approximately on the line 8-3 or" Figure 2.

Figure 4 is a side elevation of the telephone receiver having the clamping element of my improvement thereon, the latter being in section.

Figure 5 is a perspective view of the clamping element.

Figure 6 is a face View looking toward the mouth of the speaking tube.

Figure 7 is a sectional view approximately on the line 7-7 of Figure 6.

In carrying out my invention I arrange in the mouth piece 1 of a telephone 2, two disks or diaphragms 3 and 4 respectively. Each of these disks is provided with circum ferential series of apertures 5 respectively, and the said disks are centrally pivoted, as at 7. The apertures 5 of the respective disks are normally in alignment, and the disk 3 fixed while the disk 4 is revoluble on the said disk 3.

Fixed to the inner :Eaceof the disk 4 and extendlngthrough an openingin the side. of the mouth piece 1 there'is an arm.8. This;

arm is pivotally connected with aa pl-unger rod 9 received in a suitable cylindrical casing 10 that is fixed by a bracket 11 on the mouth of the speaking tube. Theplunger 9- 1s influenced by a spr1ng12 so that the arm 8 is brought into contact with one of the walls of the slot 13 through which the said arm passes, and whereby the apertures5- in the diaphragms or disks are sustained inalignment.

The cylinder 10 has its outer end closed;

by a cap member to which is: connected :1

flexible tube 14, and guided through this;

tube there is aflexibleshaft 15. Preferablythe shaft. is in the nature of a bendable but strong light wire.

The telephone receiver is indicated by the numeral 16, and has arranged thereon a clamping member of a particular and pecu liar formation. Theclamping member is illustrated in detail in Figure 5' of the drawings and as show-n therein, the same comprises a bowl-shapedend portion 17 from which extends a straight arm 18 that terminates in a band 19. The band-is integrally formed with a curved spring finger 20. The cup-Shaped end of the clamping member is designed to be received over the inner bowl-shaped end of the receiver 16, the arm 18. extending longitudinally along one side of the said receiver, the band being arranged around the receiver and the spring finger 20 disposed over and in contacting engage ment with the mouth of the receiver. The cup-shaped end 17 is provided with an open ing 21 for the cable 22 between the stand of the telephone and the receiver 16, and is likewise provided with another opening 23 formed at the end of a depression 24, the said depression extending centrally through the arm 18 and merging into a slot or opening 25.

The end of the flexible tube 14 is secured in the opening 23, while the flexible shaft is directed through the depression or groove 24 and through the slot or opening 25 in the clamping member. The end of the shaft 15 is secured to a slid-able thumb piece 26 that has a guide element 27 that passes through the opening 25 and has an inner ill flanged portion which is guided on the arm, preferably in a depression that is arranged along the edges provided by the said opening 25. The thumb piece 26 is curved in cross section and has its outer end formed with a lip 28.

It will be apparent that he party holding the receiver 16 can place his thumb or an finger againstthe thumb piece and by moving the same longitudinally, will draw on the flexible shaft 15, causing the latter to influence the plunger rod 9 against the pressure of the spring 12 to swing the inner disk 4 to bring the openings 5 therein out of alignment with the opening in the outer disk or diaphragm 3 so that the mouth piece of the telephone will be closed and so that the user can readily converse with persons in a room without the liability of the party on the second end of the line listening in.

Having described the invention, I claim- 1. In combination with a telephone, of a means for closing the speaking tube there of, comprising a fixed apertured disk in the mouth of the speaking tube, a second apertured disk pivotally secured to the fixed disk, an arm thereon extending through the side of the speaking tube, spring means influencing the arm in one direction to turn the last mentioned disk to bring the apertures thereof in alignment with the apertures of the fixed disk, and means secured on and operable from the receiver of the telephone for influencing the arm in a second direction to bring the apertures of the disks out of alignment.

2. In combination with a telephone, of a means for closing the mouth of the speaking tube thereof, comprising a fixed apertured disk in the mouth of the said tube, a second apertured disk pivot-ally secured to the fixed disk, spring influenced means for sustaining the last mentioned disk in one position to sustain the apertures thereof in registering alignment with the apertures in the fixed disk, a flexible shaft movable to influence the revoluble disk to a second posi' tion to bring the apertures thereof out of register with the apertures of the fixed disk,

a clamp on the telephone receiver through which the flexible shaft is guided, and a thumb piece slidably mounted on the clamp and to which the end of the flexible shaft is connected.

3. In combination with a telephone, ot a means for closing the mouth of the speaking tube thereof, comprising a fixed apertured disk in said mouth, a second apcrtured disk centrally pivoted to the fixed disk and having an arm passing through the side of the mouth piece, a spring influenced plunger connected to the arm, a casing therefor sup ported on the speaking tube, a flexible shaft connected with the plunger, a flexible tube through which the shaft is guided, a clamp for the receiver of the telephone to which the tube is connected and through which the flexible shaft is guided, and a slidable thumb piece on the clamp guided thercbv and to which the end of the flexible shaft is connected.

4. A clamp for a telephone receiver designed to serve as a guide for operating means for closing the speaking tube ot a telephone, said clamp comprising a member having a cup-shaped end to be arranged against the inner end of the receiver, an arm extending from the cup-shaped end grooved to receive an operating flexible shaft there through and having an opening at the terminal of the groove, a ring Formed on the free end of the arm to surround the receiver, an arched spring finger on the ring to engage the mouth of the receiver, a slidable plate guided through the opening in the arm and to which the end of the shaft is secured, and said plate having an upturned end.

In testimony whereof I atiix my signature.

JAMES G. CHAMBERS. 

